# DEFAULT_CHAIN

> `const` **DEFAULT\_CHAIN**: [`Chain`](/reference/filoz/synapse-sdk/synapse/interfaces/chain/) = `calibration`

Defined in: [packages/synapse-sdk/src/utils/constants.ts:9](https://github.com/FilOzone/synapse-sdk/blob/f17b40269f20ce1fa3544d336d07aba30788c569/packages/synapse-sdk/src/utils/constants.ts#L9)